Alpha Technologies Cordex 48-1kW 19 6000W Installation - Manual (Page 25)

030-706-B2 Rev B Page 17 of 26
6.10.1 Alarm (Relay) Outputs
Terminals provide contacts for extending various alarm or control signals. Each relay output can be wired (jumper
selectable) for NO or NC operation during an alarm or control condition. See Figure 9.
Figure 9–Showing relay connections
Relays can be programmed to energize or de-energize during an alarm condition (see CXC Software manual).
When the CXCM reset button is pressed or power is lost, all relays de-energize.
These relays could be used for additional external LVD contactor control; however, this would not provide the
redundant LVD control as with the assigned output pins described below.
6.10.1.1 LVD Control
The LVD Control functions can be hardwired directly from the assigned output pins (+ and -) to
an external LVD contactor (or panel). See Controls Menu Defaults in the CXC Software manual.
Redundant LVD Control Circuit
The shelf backplane
2 provides circuitry to override the LVD Control function. This is a safety
measure to protect against accidental load disconnect should the CXCM be removed from the
shelf. This protection is also necessary during CXCM reset.
The OUT voltage is 46V and the IN voltage is 51V. Ensure the CXCM LVD voltages are set
outside of this range. NOTE: Controller Relay 1 must be set to ENERGIZED for the LVD to
operate properly.
6.10.1.2 System Fail Output
Terminals (#0) provide connections for a system controller fail relay (K0). This is a fail-safe relay
and will de-energize during an alarm condition. Both NO and NC contacts are available for this
particular relay.
2 Apha #707-340-20 for the CXCM. See Customer Connections drawing at the rear of this manual.